Delirious/dɪˈlɪriəs/ Definition 1 of 2Pro Tip 1/3Extreme Emotion Used to express very strong feelings, often positive but sometimes negative. He was delirious with anger after the unfair decision. Pro Tip 2/3Not Always Positive Although often associated with happiness, it can also indicate distress or confusion. The crowd was delirious with panic during the blackout. Pro Tip 3/3Metaphorical Use Can be used metaphorically to describe a surreal or dream-like state. The artist's delirious creation defied all logic.